In 1964, the E-Type received several important upgrades including a 4.2-litre version of the famous XK engine. Other upgrades included a fully synchromesh transmission, new Laycock-Hausserman clutch, revised engine cooling and a new alternator which replaced the generator. The 4.2 became the most desirable version of the famous E-Type due to their increased power and usability while retaining the same outward appearance as the early cars.
Although listed as the same bhp as the 3.8, the newer model produced 255 bhp at 5400 rpm compared to 5500. Autocar also noted that torque was increased across the power band by about 10 percent. The new block was longer and completely redesigned to make room for 5mm larger bores. This gave Jaguar the opportunity to redesign the crankshaft to use newer bearings. The cooling system was redesigned to maintain the overall size of the engine. Outwardly the 4.2 is distinguished by its one-piece cast exhaust manifolds. Other upgrades include a new alternator/generator and an electric cooling fan for the radiator.
Photo Source: Favcars.com
